Shrink Pi image

gistfile1.txt

In gparted, unmount the ext4, and resize the partition

$ sudo parted /dev/sdg -s print
Model: Generic Mass-Storage (scsi)
Disk /dev/sdg: 7948MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      4194kB  47.2MB  43.0MB  primary  fat32        lba
 2      47.2MB  3193MB  3146MB  primary  ext4

$ sudo umount /dev/sdg*?
$ sudo dd if=/dev/sdg of=ardusub-raspbian-0.0.8.img bs=1M count=3194